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+/*
+Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
+For licensing, see LICENSE.html or http://ckeditor.com/license
+*/
+
+(function()
+{
+	var loadedLangs = {};
+
+	/**
+	 * @namespace Holds language related functions.
+	 */
+	CKEDITOR.lang =
+	{
+		/**
+		 * The list of languages available in the editor core.
+		 * @type Object
+		 * @example
+		 * alert( CKEDITOR.lang.en );  // "true"
+		 */
+		languages :
+		{
+			'af'	: 1,
+			'ar'	: 1,
+			'bg'	: 1,
+			'bn'	: 1,
+			'bs'	: 1,
+			'ca'	: 1,
+			'cs'	: 1,
+			'cy'	: 1,
+			'da'	: 1,
+			'de'	: 1,
+			'el'	: 1,
+			'en-au'	: 1,
+			'en-ca'	: 1,
+			'en-gb'	: 1,
+			'en'	: 1,
+			'eo'	: 1,
+			'es'	: 1,
+			'et'	: 1,
+			'eu'	: 1,
+			'fa'	: 1,
+			'fi'	: 1,
+			'fo'	: 1,
+			'fr-ca'	: 1,
+			'fr'	: 1,
+			'gl'	: 1,
+			'gu'	: 1,
+			'he'	: 1,
+			'hi'	: 1,
+			'hr'	: 1,
+			'hu'	: 1,
+			'is'	: 1,
+			'it'	: 1,
+			'ja'	: 1,
+			'ka'	: 1,
+			'km'	: 1,
+			'ko'	: 1,
+			'lt'	: 1,
+			'lv'	: 1,
+			'mn'	: 1,
+			'ms'	: 1,
+			'nb'	: 1,
+			'nl'	: 1,
+			'no'	: 1,
+			'pl'	: 1,
+			'pt-br'	: 1,
+			'pt'	: 1,
+			'ro'	: 1,
+			'ru'	: 1,
+			'sk'	: 1,
+			'sl'	: 1,
+			'sr-latn'	: 1,
+			'sr'	: 1,
+			'sv'	: 1,
+			'th'	: 1,
+			'tr'	: 1,
+			'uk'	: 1,
+			'vi'	: 1,
+			'zh-cn'	: 1,
+			'zh'	: 1
+		},
+
+		/**
+		 * Loads a specific language file, or auto detect it. A callback is
+		 * then called when the file gets loaded.
+		 * @param {String} languageCode The code of the language file to be
+		 *		loaded. If null or empty, autodetection will be performed. The
+		 *		same happens if the language is not supported.
+		 * @param {String} defaultLanguage The language to be used if
+		 *		languageCode is not supported or if the autodetection fails.
+		 * @param {Function} callback A function to be called once the
+		 *		language file is loaded. Two parameters are passed to this
+		 *		function: the language code and the loaded language entries.
+		 * @example
+		 */
+		load : function( languageCode, defaultLanguage, callback )
+		{
+			// If no languageCode - fallback to browser or default.
+			// If languageCode - fallback to no-localized version or default.
+			if ( !languageCode || !CKEDITOR.lang.languages[ languageCode ] )
+				languageCode = this.detect( defaultLanguage, languageCode );
+
+			if ( !this[ languageCode ] )
+			{
+				CKEDITOR.scriptLoader.load( CKEDITOR.getUrl(
+					'_source/' +	// @Packager.RemoveLine
+					'lang/' + languageCode + '.js' ),
+					function()
+						{
+							callback( languageCode, this[ languageCode ] );
+						}
+						, this );
+			}
+			else
+				callback( languageCode, this[ languageCode ] );
+		},
+
+		/**
+		 * Returns the language that best fit the user language. For example,
+		 * suppose that the user language is "pt-br". If this language is
+		 * supported by the editor, it is returned. Otherwise, if only "pt" is
+		 * supported, it is returned instead. If none of the previous are
+		 * supported, a default language is then returned.
+		 * @param {String} defaultLanguage The default language to be returned
+		 *		if the user language is not supported.
+		 * @param {String} [probeLanguage] A language code to try to use,
+		 *		instead of the browser based autodetection.
+		 * @returns {String} The detected language code.
+		 * @example
+		 * alert( CKEDITOR.lang.detect( 'en' ) );  // e.g., in a German browser: "de"
+		 */
+		detect : function( defaultLanguage, probeLanguage )
+		{
+			var languages = this.languages;
+			probeLanguage = probeLanguage || navigator.userLanguage || navigator.language;
+
+			var parts = probeLanguage
+					.toLowerCase()
+					.match( /([a-z]+)(?:-([a-z]+))?/ ),
+				lang = parts[1],
+				locale = parts[2];
+
+			if ( languages[ lang + '-' + locale ] )
+				lang = lang + '-' + locale;
+			else if ( !languages[ lang ] )
+				lang = null;
+
+			CKEDITOR.lang.detect = lang ?
+				function() { return lang; } :
+				function( defaultLanguage ) { return defaultLanguage; };
+
+			return lang || defaultLanguage;
+		}
+	};
+
+})();